Window-sash lock.



J. O. HUNT.

WINDOW SASH LOCK. rum-non FILED APR. 10. 190B,

91 6,446. Patented Mar. 30, 1909.

2 SHEETS-SHEET 1.

J. O. HUNT.

WINDOW SASH LOOK.

APPLICATION FILED APR.10.1908.

Patented Mar. 30, 1909.

2 sums-sum 2 17206227021 Jsse 01mm 'gs, 6 and, 7 are JESSE ORRA HUNT, OF CAIRO, ILLINOIS.

'WINDOW-SASH LOCK.

Specification of Letters Patent.

Patented March 30, 1909.

Application filed April 10, 1908. Serial No. 426,416.

To all whom it may concern:

Be it known that I, JESSE ORRA HUNT, e citizen of the United States, and a resident of Cairo, in the county of Alexander and State of Illinois, have invented certain new and useful: Im rovements in WindowSesh Locks, of whic the following is a full, clear, and exact descri tion, such as will enable others skilled in t e art to make and use the e. My invention relates to improvements in sash locks, of that class in which the lock comprises two members, one on each sash and arranged to interlock in such manner as to revent relative movement of the sashes.

he object'of my invention is to provide a sash lock of simple construction and relutively great strength to the end thet it shall be easy to attach to the Sashes end when fastened thereto shall be effective to prevent the working of the sashes from the exterior of the building.

A further object of the invention is to provide a sash lock which shall he of neat appearance and that shell be practically concealed from view from the exterior of the window and which shall be capable of easy operation from the interior.

A further and essential object of the invention is to provide a sash lock, the members of which shall be positively locked or engaged in such manner as to prevent any ot er than the deliberate disengagement, thereof from the inner side of the window, it being my special purpose to form the lock in such manner that it cannot be opened or operated by-means of a knife blade orother instrument inserted between the meeting rails of the sashes. 40

My invention consists in a sash lock of the construction and combination of arts hereinafter described and particulery pointed out in the appended. claims.

My invention will be more readily understood by reference to the accompanying drawin s forming a part of this specification, in. whic 1, l

Figure 1, is n perspective view of a sash lock embodying my invention. Fig. 2, is e vertical section thereof. Fig. 3, is e view like unto Fig. 1, showing the lock in open or pnlocked condition. Fig. 4, is a plan view of the plate member of the device. Fig. 5, is a erspective view of the hinged member.

fperspective views illustrating a modified cm of my invention in which u gravity detcnt is employed for lastoning the pivolcd member in locked position. Fig. 8, is a side view of the hinged member of Fig. 6. Figs. J and Ill, ore plan. and edge views of the plate member shown in Fig. I). Fig". 11, is a. sec Lionel detail showing the manner ol securing the hinged member in open position.

As illustrated in. the drawings my device is composed of two principal members, one being the hinged member above spoken of and the other the plate member. The hinged member comprises the vertical swinging pluto or wing, l, and the block, 2, in which it is pivoted by means of' the vertical pin, 3. The l)l0ll\', 3. is set into the upper sash A, in the meuncr host slmwn in Fig. 3. with its fau- Flush with the taco oi the sash and hence out of lhe path of the outer edge of the lower sash. ()mside 2, of the opening in the block serves as a stop for the wing in one direction and the other side 3. of the block is recessed to permit the wing to retire into :1. position [lush with the face of the sash stile. Fig. 7 shows the wing in partly un locked position Fig. 3, shows it in proper position to permit the sashes to he moved.

up or down. It will be noted that the wing is located slightly shove the top of the meet ing rail A of the upper sash, and that it is provided with a depending lug l for engagement with the plate portion of the device The upper corner of the wing is preferably provided with a knob 1, which gives it a neat appearance and facilitates its operation.

The plate member 4, of my device is carried upon the top of the lower sash B, by means of several screws 5, and is positioned directly in front of the block 2, in which position the wing may be swung over the plate when the sashes are closed. The late 4 is provided with a draft cam 4, whio 1 coects with the log- 1, of the wing, to draw the meetin rails of the sashes together as shown in Figs. 1 and 3. The earn does not exactly conform to the are described by the lug 1 when the wing is swung, but falls short thereof in the portion 4. This portion is also rounded, as shown in Fig. 4. My purpose in thus forming the cam is to prevent the engagement of the wing with the outer edge 4" of the plate 4, in' cases where the sashes loosely fit the window frame and consequently are liable to sli ht lateral dis lacement or dis-alinement. onstructed as rare shownthe device compensates for such inaccuracies in the window frame and i when swung into locked position and the sashes, the wing when swung into engagement with the plate scrvin to not only draw the sashes together but a so to move them into pro er ver ical alinemcnt.

It wil now b obvious that when the wing and the plate are in locked position they together serve to prevent the lowering of the upper sash or the raising of the lower sash. By reason of the direct on agement of the lower edge of the wing wit i the top of the plate, the device possesses great strength ecause of the vertical separation of the actual pivotal points of the wing and also b 1 reason of the engagement of the plate with the wing at a point close to the pivot of the wing.

Some window sashes are smaller than the frame in which they are held and such sashes when closed present the condition in which the meeting rail of the upper sash is above the meeting rail of the lower sash. Should my device be carelessly attached to such sashes it would revcnt the raising and lowerin of the ower and upper sashes respectlvely, but might nevorthe ess fail to prevent such further separation of the sashes as to disengage the lug 1' of the wing from the top of the plate. In, such event the jarring of the upper sash might cause the win to swing into unlocked position, or it mig t be possible to reach and operate the wing through the crack between the meeting rails of the sashes. As a precaution against the careless a plication of the sash lock in this manner l provido the block, 2, with a lug or ledge 2, (see Fig. 2) to engage the lower surface of the plate 4. It follows that when the wing is in locked position, the late, and hence the lower sash, is rigidly he (1 between the wing and the ledge 2, and is therefore held against vertical movement in relation to the upper sash. I regard this as an important feature of my invention, and one which is capable of advanta eons use in connection with various modiied forms of the sash lock herein illustrated.

I sometimes depend upon the spring ofthe sashes to hold the wing and plate in locked position, in such cases providing a slight dc pression at the inner end of the cam surface 4. This method of fastening the parts is not wholly reliable and I therefore prefer to provide positive means for fastening the members of the lock in 10 ed position. The fastener may partake of various forms and I have shown two ditlerent'fastening devices in the drawings. The first, illustrated in Figs. 1 to 4, comprises a horizontal latch 6, at tached to the plate by a vertical pin 6, and held in closed position by a flat s- )ring 6 on the end of the plate. The late and. cam surface together form a socket 7, to receive the lug l of the wing. The end 6' of the latch is beveled to readily admit the lug hook of the latch prevents the disengagement of the wing from locked position except when the latch is drawn out to the dotted position shown in Fig. 4. T he small knob 6" on the latch facilitates its operation. The end 6 of the latch and the surface 4" of the plate (o-act as stops to prevent excessive movement of the latch. 'lhe flat spriu 6" is hold in position by a screw or rivet anil by the engagement of its end with a shoulder 4* on the plate 4 (see Figs. 1, 2 and l).

Instead of placing the lastencr. upon the plate portion of my device I may arran c it u )011 the pivoted portion thereof an in lugs. 6 lo 11, have illustrated one of the many forms in which such a fastener may be made. This fastener comprises a gravity pin 7, slidable in the end 1, of the wing 1, a r d at its upper end )rovided with a knob 7 ing of the wing from the pin. lhe lower end of the pin nornmlly projects below the lug 1 of the wing and when the wing is swung to the locked position, drops into the socket 4 in the plate 4. in this case the cam surface of the plate terminates in an abrupt shoulder 4 to serve as a stop for the wing. The pin Means are provic ed to prevent the lift 7 may also be used as a convenient means for fastening the viing in an unlocked posi tion, the meeting rail of the upper sash being provided with a socket 8 to receive the pin. In some cases I form the socket in a separate metal wart S constructed as shown in ig. 11. Short spuds 9 on the bottom of the plate 4 facilitate the placin of the plate on the lower sash by holding t e plate in position while the screws are being driven into place.

As various modifications of my invention will readily suggest themselves to one skilled in the art, I do not confine the invention to the specific structures herein shown and described.

Having thus fully described my invention member together being adapted to prevent movement of said plate in either direction, substantially as described.

2. An upper sash, in combination with a block set into the stile thereof said block 7 and sash being recessed, ,a wmg1 vertically pivoted in said block and adapte to occupy said recess, said block having a ledge below said wing, a lower sash, a plate attached to the top of the lower sashin position to substantially contact said block and to engage the top of said ledge on the block, a cam on 3. A sash lock comprising a plate having a cam surface, in combination with a block having a ledge on its lower part, a wing pivoted in said block above said ledge for engagement with the top ol the plate and lathe cam surface thereof, said ledge upon llie block being adapted for engagement with, the bottom of said plate and a hook like i on the,

inccting rails, in combination with a block spring detent vertically pivoted p ate for securing the win in locked posi- 15 tion, substantially as deseri )ed.

4. The combination with upper and lower window sashes, of a locking incmbr-r pivoted at one end to said upper sash and adapted to be swung into the vertical path of the 20 lower sash, a lug upon the free end ol said member, a plate upon the upper surface of the lower sash, a draft cam upon the said plate, a detent upon said plate, said detcnt eing rovided with a curved hooked end 25 normaly forming with said dral't cam, a

recess for the reception of said lug, a beveled surface upon said detent whereby the hooked end thereof is moved out of the path of the lug when said lug contacts with 30 said surface, and resilient means adapted to return said hooked end to its normal position, substantially as described.

An upper sash, in combination with a block set into the stile thereof, said block and sash being; recessed, a wing vertically pivoted in said block and adapted to occupy said recess, said block having a ledge below said wing, a lower sash, a )liLtO attached to the top of the lower sasi in pos tion to substantially contact said block and the top ol the lodge thereon, a rain on said plate lor (to-action with said wing" and a fastener adapted to secure the wing in locked position, substantially as described.

it An upper sash and a lower sash having set into the stile of said upper sash and projecting belmv the to of the meeting rail of the lower sash, said block and sash being recessed, a wing vertically pivoted in said block and adapted to occupy said recess, a date upon the top of the meeting, rail of the lower sash, a driil't cam thereon [or eo-artion with said wing and a ledge upon said block in position to engage the lower side of said plate, substantially as described.

In tcsl iinony whercol, l have hereunto set my hand, this 24th day of March, 1908, in the presence of two subscribing WllJWRsGS.

JESSE ()IKKA HUNT.

Witnesses:

(militias GILBERT HAWLEY, M. Simon. 

